Jefferies (elbow) threw a live batting practice session earlier this week and is expected to begin a rehab assignment soon, Noah Hiles of the Pittsburgh Post-Gazette reports.

EDGE Analysis

Jefferies has been sidelined since early July with right elbow inflammation but is finally ready to test things out in a game setting. Given the length of his absence, he figures to require a handful of rehab appearances before being considered for the Pirates' active roster.